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A Probability Structure for Growth Curves
G. F. Krause, P. B. Siegel and D. C. Hurst
Vol. 23, No. 2 (Jun., 1967), pp. 217-225
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2528157
Page Count: 9
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A conditional probability density for body-weight of chickens is derived by making a priori assumptions about the probability densities of the descriptive parameters. This formulation incorporates the idea that animal to animal genetic differences, which dictate growth and hence the parameters in the describing function, can be realized as a sampling of parameters from the a priori distributions. The closed form is evaluated numerically in an example to obtain ordinates and the first four moments of each conditional density. These moments reflect the typical mean and variance structure of body weights as age increases. As a result of the formulation, multivariate techniques are suggested as a means of comparing growth curves.
Biometrics © 1967 International Biometric Society